---
title: "Test the application"
url: https://docs.catalyst.zoho.com/en/tutorials/dialer-app/nodejs/test-application/
description: "Build a dialer application using Catalyst Advanced I/O Functions,DataStore and integration with Twilio’s Voice API that establishes an outbound call connection between your sales team and customers."
last_updated: 2026-08-17T12:16:04Z
service: All Services
type: tutorial
related_links:
  - name: "Serve CLI Resources"
    url: /en/cli/v1/serve-resources/introduction
---

# Test the application

Before you deploy the application to the remote console, you can test the application on a local server and check if everything works using the Catalyst CLI. For detailed information on `catalyst serve`, refer to the [Serve Resources help page](https://docs.catalyst.zoho.com/en/cli/v1/serve-resources/introduction).

To serve the Catalyst project locally, execute the following command from your project directory (CATALYST_PROJECT_HOME):

```sh
 catalyst serve
```

The CatalystDialer application will now be served at default port 3000. The local endpoint URLs of the components are displayed.

> **Note : ** Every time you access the home page or any of the sub-pages of your client, or the function, the CLI will display a live log of the URL accessed, along with the HTTP method that is used to access it.

![local-serve](https://catalyst-docs-development.zohostratus.in/images/tutorials/dialer-app/local-serve.webp)

You can now open the client component's local URL in a browser to access the Dialer application.

![localhost-url2](https://catalyst-docs-development.zohostratus.in/images/tutorials/dialer-app//localhost-url2.webp)

Once you input the customer and sales person's contact number and initiate the call, you will be notified that the call has been successfully initiated.

![call-alert](https://catalyst-docs-development.zohostratus.in/images/tutorials/dialer-app//call-alert-updated.webp)

After the call is done, you can click on **View Call Logs** to see the call logs.

![call-log](https://catalyst-docs-development.zohostratus.in/images/tutorials/dialer-app//call-log.webp)

You can click **View Dialer** again to go back to the dialer screen.If this setup is working correctly, we can deploy the application to production.